First clear all the content (AMS_StockCarBrasil2010_v1.0) of the game.

If you installed (AMS_StockCarBrasil2009_v1.0), do the same, clear all the content.

Then start a clean installation. I discovered that it is necessary to install the mod (AMS_StockCarBrasil2009_v1.0) and then the mod (AMS_StockCarBrasil2010_v1.0). When you ask for permission to subscribe to the files, click Yes.